HOMEVULNERABILITIESCVE-2023-23928
CRITICAL

CVE-2023-23928

CWE-347Published: February 1, 2023· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

reason-jose is a JOSE implementation in ReasonML and OCaml.`Jose.Jws.validate` does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation. This issue has been patched in version 0.8.2.

NVD Source

Technical Analysis

CVE-2023-23928 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

reason-jose_project1 product(s)
reason-jose
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5
PATCHhttps://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5
ADVISORYhttps://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2
ADVISORYhttps://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7
ADVISORYhttps://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2
ADVISORYhttps://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7

All References (6)

→
https://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5Patch · Third Party Advisory
→
https://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2Release Notes · Third Party Advisory
→
https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7Third Party Advisory
→
https://github.com/ulrikstrid/reason-jose/commit/36cd724db3cbec121757624da49072386bd869e5Patch · Third Party Advisory
→
https://github.com/ulrikstrid/reason-jose/releases/tag/v0.8.2Release Notes · Third Party Advisory
→
https://github.com/ulrikstrid/reason-jose/security/advisories/GHSA-7jj9-6qwv-wpm7Third Party Advisory

Quick Facts

CVE IDCVE-2023-23928
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-347
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 1, 2023

Related CVEs (CWE-347)

CVE-2026-56451
10.0
CVE-2024-32962
10.0
CVE-2026-48558
KEV10.0
CVE-2026-44748
9.9
CVE-2026-6911
9.8
CVE-2026-28802
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-23928 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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